It is a good game challenging to survive the waves it's pretty good but if there can be more you know like things upgrade

Surviving the waves for unlocking the new areas is fun good game i liked it

ok, let's talk real here, I didn't play the game on mobile but I did play it on PC, instead of paying 1 dollar just go to "CrazyGames.com" and play it from there, the gameplay is that you have complete waves and gather points to upgrade, but the catch is that if a wave ended and you haven't popped enough bloons, you lose all your stuff and go back from the first wave, of course, the game itself isn't long, it's just a few waves, there isn't any worlds or stuff, but to be honest I didn't bother to complete the game because I just played BTD4.